Reg:

I can comment on my recent experiments with a half-wave vertical on
10-11 meters.

A current balun (or ferrite beads on the coax) greatly reduce feedline
radiation--seems to have an overall beneficial effects on the antennas
radiation pattern--and seems to "stabilize" the pruning/tuning of the
antenna (things begin behaving in a linear and logical way.)

Mind you, the above is only deduced/measured with a FSM, SWR bridge (of
the type which does NOT work for real measurement of swr but rather
transmitter loading) and observed/known signals from other stations and
the reports given back on my signal from these stations.

While this may be viewed as "crude" by some--it is real world in that
the effects as least "seem" real.

Or, the short form of all this is, "The Current Balun is my friend!"

John

"Reg Edwards" wrote in message
...
A choke balun is what is inserted between the transmitter end of the
antenna feedline and the transmitte tuner. Or it can be inserted at
the antenna end of the line.

Questions : How effective is it? To what extent can the percentage
unbalance current on the feedline be expected to be reduced? Has
anybody ever measured it before and after insertion?
----
Reg.